keyword
MENU ▼
Read by QxMD icon Read
search

Formaldehyde

keyword
https://www.readbyqxmd.com/read/28542788/saturated-salt-solution-a-further-step-to-a-formaldehyde-free-embalming-method-for-veterinary-gross-anatomy
#1
M Lombardero, M M Yllera, A Costa-E-Silva, M J Oliveira, P G Ferreira
In the field of veterinary anatomy, most of the specimens used in practical sessions are perfused with fixatives. Thus, they can be used for a longer time, reducing the number of animals for educational purposes. Formalin is the most commonly used fixative, consisting of a 37% formaldehyde solution. However, formaldehyde is a powerful irritant of the eyes and airways and is considered carcinogenic, causing nasopharyngeal cancer in exposed workers and professionals. In the present study, we explored an alternative method to avoid the use of formaldehyde in specimens used for gross anatomy practical sessions...
May 24, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28537706/sodium-rivals-silver-as-single-atom-active-centers-for-catalyzing-abatement-of-formaldehyde
#2
Yaxin Chen, Jiayi Gao, Zhiwei Huang, Meijuan Zhou, Junxiao Chen, Chao Li, Zhen Ma, Jianmin Chen, Xingfu Tang
The development of efficient alkali-based catalysts for the abatement of formaldehyde (HCHO), a ubiquitous air pollutant, is economically desirable. Here we comparatively study the catalytic performance of two single-atom catalysts, Na1/HMO and Ag1/HMO (HMO = Hollandite manganese oxide), in the complete oxidation of HCHO at low temperatures, in which the products are only CO2 and H2O. These catalysts are synthesized by anchoring single sodium ions or silver atoms on HMO(001) surfaces. Synchrotron X-ray diffraction patterns with structural refinement together with transmission electron microscopy images demonstrate that single sodium ions on the HMO(001) surfaces of Na1/HMO have the same local structures as silver atoms of Ag1/HMO...
May 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28537027/evaluation-of-the-sensitivity-spectrum-of-a-video-tracking-system-with-zebrafish-danio-rerio-exposed-to-five-different-toxicants
#3
João Amorim, Miguel Fernandes, Vitor Vasconcelos, Luis Oliva Teles
The aim of this study was to develop a biological early warning system for the detection of aquatic toxicity and test it with five toxicants with distinct chemical nature. This was done in order to verify the spectrum of sensitivities of the proposed system, as well as the potential identification capability of the tested contaminants, using only the analysis of zebrafish's behavior. Six experimental conditions were tested: negative control and five toxicants (bleach, lindane, tributyltin, mercury, and formaldehyde)...
May 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28536783/ph-influences-the-biocompatibility-of-methylene-blue-solutions
#4
David Jonathan Rodrigues Gusman, Luciano Tavares Angelo Cintra, Vivian Cristina Noronha Novaes, Henrique Rinaldi Matheus, Nathália Januario de Araujo, Juliano Milanezi de Almeida
OBJECTIVE: The aim of this study was to investigate the biocompatibility of methylene blue at different pH levels through the method of implantation in subcutaneous tissue. MATERIALS AND METHODS: Eighty-four sterilized polyethylene tubes were allocated in the subcutaneous tissue of 28 rats, each one receiving four tubes, set into four groups: group tube (G-T)-empty tube, fibrin group (G-F)-tube filled with fibrin sponge, group methylene blue pH 7 (G-MB/pH 7)-tube filled with fibrin sponge soaked by methylene blue (100 μg/ml) at pH 7...
May 23, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28532805/efficacy-of-disinfectants-and-detergents-intended-for-a-pig-farm-environment-where-salmonella-is-present
#5
Rebecca J Gosling, Ian Mawhinney, Kelly Vaughan, Robert H Davies, Richard P Smith
Disinfection is a useful component of disease control, although products and chemical groups vary in their activity against different pathogens. This study investigated the ability of fifteen disinfectants to eliminate pig-associated Salmonella. Active compounds of products included chlorocresol, glutaraldehyde/formaldehyde, glutaraldehyde/quaternary ammonium compounds (QAC), iodine, peracetic acid and potassium peroxomonosulphate. Six detergents were also tested for their ability to dislodge faecal material, and interactions with specific disinfectants...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28531897/magnetic-resonance-imaging-of-the-brain-of-a-monotreme-the-short-beaked-echidna-tachyglossus-aculeatus
#6
Sandilya Cherupalli, Craig D Hardman, Andre Bongers, Ken W S Ashwell
We used magnetic resonance imaging to study the anatomy of cortical regions, nuclear groups, and major tracts in the brain of a monotreme, i.e., the short-beaked echidna (Tachyglossus aculeatus). Our specimens were from a collection held at the Australian Museum in Sydney and had been stored in formaldehyde solution for at least 70 years. Despite this, we were able to detect fine detail in the nuclear divisions of structures as well as in fiber tracts. In particular, we could detect the medial lemniscus as it approached the ventral posterior thalamic nucleus, subdivisions within the ventral posterior thalamic nucleus, lamination and subdivisions within the hippocampal formation, components of the olfactory pathways, and nuclei within the temporal amygdala...
May 23, 2017: Brain, Behavior and Evolution
https://www.readbyqxmd.com/read/28528972/brand-variation-in-oxidant-production-in-mainstream-cigarette-smoke-carbonyls-and-free-radicals
#7
Samantha M Reilly, Reema Goel, Neil Trushin, Ryan J Elias, Jonathan Foulds, Joshua Muscat, Jason Liao, John P Richie
Oxidative stress/damage resulting from exposure to cigarette smoke plays a critical role in the development of tobacco-caused diseases. Carbonyls and free radicals are two major classes of oxidants in tobacco smoke. There is little information on the combined delivery of these oxidants across different cigarette brands; thus, we set out to measure and compare their levels in mainstream smoke from popular US cigarettes. Mainstream smoke from 28 different cigarette brands produced by smoking (FTC protocol) was analyzed for five important, abundant carbonyls, and levels were compared to previously determined free radical for the same brands...
May 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28527906/fluorescent-probes-for-imaging-formaldehyde-in-biological-systems
#8
REVIEW
Kevin J Bruemmer, Thomas F Brewer, Christopher J Chang
Formaldehyde (FA) is a common environmental toxin but is also endogenously produced through a diverse array of essential biological processes, including mitochondrial one-carbon metabolism, metabolite oxidation, and nuclear epigenetic modifications. Its high electrophilicity enables reactivity with a wide variety of biological nucleophiles, which can be beneficial or detrimental to cellular function depending on the context. New methods that enable detection of FA in living systems can help disentangle the signal/stress dichotomy of this simplest reactive carbonyl species (RCS), and fluorescent probes for FA with high selectivity and sensitivity have emerged as promising chemical tools in this regard...
May 18, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/28523730/investigating-the-effect-of-carbon-source-on-rabies-virus-glycoprotein-production-in-pichia-pastoris-by-a-transcriptomic-approach
#9
Safa Ben Azoun, Héla Kallel
Several factors affect protein expression in Pichia pastoris, one among them is the carbon source. In this work, we studied the effect of this factor on the expression level of rabies virus glycoprotein (RABV-G) in two recombinant clones harboring seven copies of the gene of interest. The expression was driven either by the constitutive glyceraldehyde-3-phosphate dehydrogenase (GAP) promoter or the inducible alcohol oxidase1 (AOX1) promoter. Clones were compared in terms of cell physiology and carbon source metabolism...
May 18, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28516135/data-for-the-synthesis-of-resorcinol-formaldehyde-aerogels-in-acidic-and-basic-media
#10
Daniel F Molina-Campos, Rafael A Fonseca-Correa, Diana P Vargas-Delgadillo, Liliana Giraldo, Juan Carlos Moreno-Piraján
The aim of this research is to synthesise carbon aerogels and to compare the differences in their textural, morphological and chemical properties when synthesised in basic and acidic media, and with two different types of pretreatment carbonization and activation with CO2. Four samples are prepared and characterised using TGA-DTA, SEM, DRX, isotherm determination of N2 adsorption-desorption at -196 °C and immersion calorimetry. The data for pore distribution are reported using non-local density functional theory and quenched solid density functional theory...
June 2017: Data in Brief
https://www.readbyqxmd.com/read/28514854/a-new-approach-for-the-synthesis-of-nano-zirconia-fortified-microcapsules
#11
Chia-Chen Li, Dzu-How Yu, Shinn-Jen Chang, Jia-Wei Chen
Robust poly(urea-formaldehyde) (PUF) microcapsules with composite shells comprising zirconia (ZrO2) nanopowder incorporated in PUF were fabricated via a novel and facile one-pot synthesis. ZrO2 nanopowder was chosen because it owns one of the highest mechanical strength among ceramics. The nanopowder was pre-dispersed in the core material to combine encapsulation and fortification into a single process. In the core, the well-dispersed nanopowder migrated to the interface, where PUF polymerization took place...
May 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28513508/harmful-effects-of-formaldehyde-and-possible-protective-effect-of-nigella-sativa-on-the-trachea-of-rats
#12
E Sapmaz, H I Sapmaz, N Vardi, U Tas, M Sarsilmaz, Y Toplu, A Arici, M Uysal
OBJECTIVE: We aimed in this study to investigate the harmful effects of formaldehyde (FA) inhalation and possible protective effects of Nigella sativa (NS) on rats' trachea. MATERIALS AND METHODS: In this study, 63 adult male rats were used. Animals were divided into nine groups. Group I was used as control group. All other groups were exposed to FA inhalation. Group III, V, VII, and IX were administered NS by gavage. Tissues were examined histologically, and immunohistochemical examination for Bax and caspase-3 immunoreactivity was carried out...
May 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28512342/a-gas-sensor-array-for-the-simultaneous-detection-of-multiple-vocs
#13
Yumin Zhang, Jianhong Zhao, Tengfei Du, Zhongqi Zhu, Jin Zhang, Qingju Liu
Air quality around the globe is declining and public health is seriously threatened by indoor air pollution. Typically, indoor air pollutants are composed of a series of volatile organic compounds (VOCs) that are generally harmful to the human body, especially VOCs with low molecular weights (less than 100 Da). Moreover, in some situations, more than one type of VOC is present; thus, a device that can detect one or more VOCs simultaneously would be most beneficial. Here, we synthesized a sensor array with 4 units to detect 4 VOCs: acetone (unit 1), benzene (unit 2), methanol (unit 3) and formaldehyde (unit 4) simultaneously...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28508036/room-temperature-stable-co-x-free-h2-production-from-methanol-with-magnesium-oxide-nanophotocatalysts
#14
Zhengqing Liu, Zongyou Yin, Casandra Cox, Michel Bosman, Xiaofeng Qian, Na Li, Hongyang Zhao, Yaping Du, Ju Li, Daniel G Nocera
Methanol, which contains 12.6 weight percent hydrogen, is a good hydrogen storage medium because it is a liquid at room temperature. However, by releasing the hydrogen, undesirable CO and/or CO2 byproducts are formed during catalytic fuel reforming. We show that alkaline earth metal oxides, in our case MgO nanocrystals, exhibit stable photocatalytic activity for CO/CO2-free H2 production from liquid methanol at room temperature. The performance of MgO nanocrystals toward methanol dehydrogenation increases with time and approaches ~320 μmol g(-1) hour(-1) after a 2-day photocatalytic reaction...
September 2016: Science Advances
https://www.readbyqxmd.com/read/28507483/effects-of-hesperidin-on-formaldehyde-induced-toxicity-in-pregnant-rats
#15
Sameha Merzoug, Mohamed Lamine Toumi
This experimental study aimed to investigate the protective effect of a bioflavonoid, hesperidin (HP), on formaldehyde (FA)-related pathophysiological and behavioral outcomes in pregnant rats and developmental aspects in their offspring. Female Wistar rats were subjected to perigestational exposure to FA (2 mg/kg/day per os) with a concomitant treatment with HP (50 mg/kg/day per os). Pregnant rats were weighed throughout gestation and tested in two behavioral paradigms (elevated plus-maze and open field) at gestational days (GD) 1, 10 and 19 to evaluate the anxiety-like behavior and locomotive alterations...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28501752/effects-of-dust-formaldehyde-and-delayed-feeding-on-early-postnatal-development-of-broiler-chickens
#16
Pieter de Gouw, Lotte J F van de Ven, Sander Lourens, Bas Kemp, Henry van den Brand
We investigated effects of perinatal exposure to dust or formaldehyde and the moment of first feed intake after hatching on broiler chicken development during the first week of life. Four environmental treatments were used from 468 until 512h of incubation: control (CONT), heat treated dust (HTD), untreated dust (UTD) or formaldehyde disinfection (FORM). After hatching, all chickens were assigned to 1 of 2 feeding treatments: early feeding (EF; feed and water available in the hatcher) or delayed feeding (DF)...
May 4, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28499178/degradation-of-gaseous-formaldehyde-via-visible-light-photocatalysis-using-multi-element-doped-titania-nanoparticles
#17
Maricris T Laciste, Mark Daniel G de Luna, Nolan C Tolosa, Ming-Chun Lu
This study developed a modified titanium dioxide photocatalyst doped with multi-element synthesized via sol-gel process to productize a novel photocatalyst. The study includes degradation of gaseous formaldehyde under visible light using the synthesized novel titanium dioxide photocatalyst. Varying molar ratios from 0 to 2 percent (%mole in titanium dioxide) of ammonium fluoride, silver nitrate and sodium tungstate as dopant precursors for nitrogen, fluorine, silver and tungsten were used. Photodegradation of gaseous formaldehyde was examined on glass tubular reactors illuminated with blue light emitting diodes (LEDs) using immobilized photocatalyst...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28494602/are-there-any-differences-between-first-and-second-primary-molar-pulpectomy-prognoses-a-retrospective-clinical-study
#18
A Mendoza-Mendoza, C Caleza-Jiménez, B Solano-Mendoza, A Iglesias-Linares
AIM: To determine if there are any significant differences between the prognoses of pulpectomies done on first and second primary molars of the upper and lower dental arch. MATERIALS AND METHODS: Study Design: The clinical study included 55 children who had undergone 86 pulpectomy treatments, 41 on the first molars and 45 on the second molars. The root canal filling material consisted of a paste based on Walkhoff formula, containing Kri-1, calcium hydroxide and meta-cresol formaldehyde...
March 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28489407/high-yield-synthesis-of-janus-dendritic-mesoporous-silica-resorcinol-formaldehyde-nanoparticles-a-competing-growth-mechanism
#19
Lili Qu, Huicheng Hu, Jiaqi Yu, Xiaoya Yu, Jian Liu, Yong Xu, Qiao Zhang
Recently, Janus nanostructures that possess two or more different surface functions have attracted enormous attention because of their unique structures and promising applications in diverse fields. In this work, we present that Janus structured dendritic mesoporous silica @ resorcinol-formaldehyde (DMS@RF) nanoparticles can be prepared through a simple one-pot colloidal method. The Janus DMS@RF nanoparticle shows a bonsai-like morphology which is consisted of a dendritic mesoporous silica part and a spherical RF part...
May 10, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28486343/fractional-exhaled-nitric-oxide-feno-and-spirometry-as-indicators-of-inhalation-exposure-to-chemical-agents-in-pathology-workers
#20
Ritsuko Arakawa Suzuki, Toshiya Irokawa, Hiromasa Ogawa, Shinya Ohkouchi, Masao Tabata, Susumu Togashi, Takeshi Nakamura, Noriko Ohisa, Etsuhiro Nikkuni, Emiri Miura, Kaoru Yoshida, Hiroshi Inomata, Hajime Kurosawa
OBJECTIVE: The objective of this study was to examine whether fractional exhaled nitric oxide (FeNO) and spirometry can be used as indices to evaluate adverse health effects of low-concentrated chemical inhalation exposure, mainly to formaldehyde. METHODS: Thirty-three subjects (pathology technicians) and 30 controls (workers without handling any chemicals in the same hospitals) participated in this study. All participants underwent FeNO measurement and spirometry before and after 5 days of work...
May 2017: Journal of Occupational and Environmental Medicine
keyword
keyword
50716
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"